660772967400 has 1440 divisors, whose sum is σ = 2939403012000. Its totient is φ = 131864785920.

The previous prime is 660772967389. The next prime is 660772967441. The reversal of 660772967400 is 4769277066.

It is a happy number.

660772967400 is a `hidden beast` number, since 6 + 607 + 7 + 29 + 6 + 7 + 4 + 0 + 0 = 666.

660772967400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 1067484291 + ... + 1067484909.

Almost surely, 2^660772967400 is an apocalyptic number.

660772967400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660772967400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1469701506000).

660772967400 is an abundant number, since it is smaller than the sum of its proper divisors (2278630044600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660772967400 is a wasteful number, since it uses less digits than its factorization.

660772967400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 5334336, while the sum is 54.

The spelling of 660772967400 in words is "six hundred sixty billion, seven hundred seventy-two million, nine hundred sixty-seven thousand, four hundred".